CN100566450C - Mobile radio system and mobile wireless electric control method - Google Patents
Mobile radio system and mobile wireless electric control method Download PDFInfo
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- CN100566450C CN100566450C CNB2006101656282A CN200610165628A CN100566450C CN 100566450 C CN100566450 C CN 100566450C CN B2006101656282 A CNB2006101656282 A CN B2006101656282A CN 200610165628 A CN200610165628 A CN 200610165628A CN 100566450 C CN100566450 C CN 100566450C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2678—Time synchronisation
- H04B7/2687—Inter base stations synchronisation
- H04B7/269—Master/slave synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2678—Time synchronisation
- H04B7/2687—Inter base stations synchronisation
- H04B7/2693—Centralised synchronisation, i.e. using external universal time reference, e.g. by using a global positioning system [GPS] or by distributing time reference over the wireline network
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Abstract
The invention provides mobile radio system and mobile wireless electric control method.A kind of mobile radio station can with fixed station and other mobile station communicates.Described mobile radio station comprises receiving element, and this receiving element receives first timing information, second timing information and about the reliability information of described second timing information.Selector is based on described reliability information, selects to be used for the timing regularly of communicating by letter with described fixed station or described other mobile radio stations between described first timing information and described second timing information.
Description
Technical field
The present invention relates to a kind of mobile radio system and mobile wireless electric control method, be used for carrying out effectively radio communication between a plurality of mobile radio stations and the radio communication between fixed station and a plurality of mobile radio station.Preferably, mobile radio station is provided with the terminal such as personal computer etc.
Background technology
Known have various communication systems, and proposed various multiplex communication systems for the demand of big volume transport.For example, TDMA (time division multiple access), FDMA (frequency division multiple access), CSMA (carrier sense multiple) and CDMA (code division multiple access) etc. are known and also be applied to radio communication.And, also known a kind of by making up the system that these multiplexed communications form, be used to realize radio communication between many mobile radio stations or the radio communication between fixed station and a plurality of mobile radio station.
And, in mobile telephone system, dispersed placement has a plurality of base stations so that the service area of overlapping to be provided partly, thereby the user who carries mobile phone can be communicated by letter with other mobile phones or landline telephone when moving, and gives each mobile phone from base station side with channel allocation.And, a kind of control method has also been proposed, wherein mobile radio station uses common signal channel to utilize the CSMA/CA system to send channel assignment request to fixed station from mobile radio station.Fixed station is based on the scheduling of tdma system execution to transmitting time.(for example, with reference to TOHKEMY 2002-374265 communique).In addition, a kind of system and the control method (for example, with reference to TOHKEMY 2005-73240 communique) that can guarantee bandwidth also proposed.In this system, on time shaft, periodically divide beacon region, TDMA district and CSMA district, and carry out the zone and select, wherein beacon region is used for sending corresponding beacon packet from a plurality of main websites (fixed station), the TDMA district is used to use the wave band that distributes the specific station of allowing based on the time-division, and the CSMA district makes it possible to conduct interviews by competition.
In order on 1: 1 basis, to carry out radio communication, need divide to be equipped with in the predetermined frequency band of avoiding being provided with therein a plurality of communication channels to communication channel to produce the phase mutual interference by a plurality of mobile radio stations.When as under the situation in mobile telephone system, each fixed station (base station) being set when covering almost each service area at each zone, can be at the distribution of mobile radio station (mobile phone) control on fixed station (base station) side to communication channel, but when a plurality of fixed stations when road etc. is distributed in the position of concern, perhaps when having distributed when event zone is defined as the fixed station of service area, if mobile radio station does not move to the service area (hot zones) of this fixed station, then can not enjoy the traffic channel assignment service.Therefore, a kind ofly be used for automatic control and select communication channel can be applicable to radio communication between a plurality of mobile radio stations with the system that avoids the phase mutual interference by introducing the CSMA system.
And, the CSMA system can also be used as the redundant system between the mobile radio station, and with the multiplex system of TDD (time division duplex) system as the radio communication between mobile radio station and the fixed station.In this radio communications system, when mobile radio station when the fixed station, the transmission of determining mobile radio station according to the TDD slot timing regularly and when mobile radio station and fixed station communicate, makes the TDD slot timing synchronous.Yet, if fixed station not near the zone mobile radio station with to obtain the cellular radio system of slot timing signal from fixed station different, needs mobile radio station to keep continuously regularly with synchronous with the fixed station automatic control.
Therefore, also consider to be suitable for a kind of device, it obtains synchronously by obtaining correct time information based on the GPS that is used for slot synchronization (global positioning system), but, need all the time to receive radio wave continuously from four or more a plurality of gps satellite for acquisition time information continuously by receiving radio wave from gps satellite.Yet, not in the good zone in the radio wave accepting state of gps satellite, mobile radio station is difficult to obtain temporal information by the radio wave reception from gps satellite.Therefore, be difficult in some cases carry out continuously self controllable synchronously.In addition, when fixed station when the radio wave accepting state of near the location mobile radio station and gps satellite is not on duty mutually, can utilize the CSMA system to realize radio communication between the mobile radio station.Yet, for by make the slot length of the time slot that in the CSMA system, uses equate according to the TDD system with the slot length of the time slot that is assigned to the TDD slot timing that fixed station uses, thereby realize radio communication efficiently, must be by receiving radio wave from gps satellite, obtain correct time information then, thus slot synchronization obtained continuously.In this case, as mentioned above, mobile radio station often faces by catching four or more a plurality of gps satellite all the time and obtains the difficulty of temporal information aspect.Therefore, a problem occurs, that is, be difficult to obtain slot synchronization accurately continuously, thereby cause interference the radio communication of other mobile radio stations.
Summary of the invention
On the one hand, the present invention can send the temporal information that is added with reliability information by making between the mobile radio station, and by the continuous high-precise synchronization of realization, thereby solved the problems referred to above.
Mobile radio system according to an aspect of the present invention is a kind of being used for according to radio communication time period between TDD system control fixed station and a plurality of mobile radio station and the mobile radio system of the radio communication time period between a plurality of mobile radio station.Described fixed station and mobile radio station are respectively equipped with: the temporal information deriving means, and this temporal information deriving means is used to obtain outside high precision time information; Send regularly generating apparatus, this transmission regularly generating apparatus is used for the system according to TDD, and the described temporal information of obtaining from described temporal information deriving means generates the transmission timing signal; It is characterized in that comprising: counter, this counter carries out counting operation to the cycle of described at least transmission timing signal, and is reset when getting access to described temporal information by described temporal information deriving means; Supplementary transmission/receiving system, this supplementary transmission/receiving system is used to send wherein and sends regularly the described transmission timing signal that generating apparatus generates and be defined as internal timing signal and the count value of described counter is defined as the supplementary of internal count value described, and is used to receive wherein the supplementary that transmission timing signal with other stations is defined as external timing signal and the count value of the counter at other stations is defined as the external counting value; And TDD transmission/receiving control device, of being used for by the timing signal of selecting based on the comparison of described internal count value and described external counting value of this TDD transmission/receiving control device controls described internal timing signal and described external timing signal.
In addition, the present invention also provides: comparison means, this comparison means is used for described internal count value and described external counting value are compared, described TDD transmission/receiving control device is used for selecting described internal timing signal by described comparison means during less than described external counting value in described internal count value, selects described external timing signal during less than described internal count value in described external counting value; With main information transmission/receiving system, in timing, control this main information transmission/receiving system by described TDD transmission/receiving control device.
Mobile wireless electric control method according to an aspect of the present invention is the radio communication time period that is used for according between TDD system control fixed station and a plurality of mobile radio station, and the mobile wireless electric control method of the radio communication time period between a plurality of mobile radio stations, this mobile wireless electric control method may further comprise the steps: described fixed station and described a plurality of mobile radio station all obtain same outside high precision time information and send timing signal to generate, it is characterized in that, when getting access to described temporal information, will be used for the cycle of described at least transmission timing signal is carried out the counter reset of counting operation; The count value of described counter is defined as internal count value, and will be defined as internal timing signal from the described transmission timing signal that described temporal information generates; Send described internal count value and described internal timing signal with supplementary; Receive external counting value and external timing signal with supplementary; Described internal count value and described external counting value are compared; And select timing signal corresponding to less count value.
This method is further comprising the steps of: based on the TDD system synchronous with described transmission timing signal, switch between a plurality of mobile radio stations according to communicating by letter the period between communication period of CSMA system and described fixed station and a plurality of mobile radio stations.
Mobile radio station according to an aspect of the present invention can with fixed station and other mobile station communicates, described mobile radio station comprises: receiving element, this receiving element receives timing information; Send timing generator, this sends timing generator and generates transmission regularly based on described timing information; Counter, this counter carries out counting operation to generating the cycle that sends timing regularly at least, and is reset when getting access to described timing information by described receiving element; And transmitting element, this transmitting element sends regularly and is sent in described other mobile radio stations at least one about the described count value that sends described counter regularly described, it is characterized in that further comprising: selector, this selector is based on sending regularly and each count value from the transmission regularly that described fixed station or described other mobile radio stations obtain about described, send timing and between the transmission regularly of described fixed station or described other mobile radio stations acquisitions, select one regularly described, and the count value of selected timing and correspondence is offered described transmitting element to send.
Description of drawings
Fig. 1 is the key diagram of first embodiment of the invention.
Fig. 2 (A), 2 (B), 2 (C) are used for temporal information to transmit the key diagram that switches with the period of communicating by letter.
Embodiment
With reference to Fig. 1, the mobile radio system of an embodiment is to be used for being controlled at radio communication period between fixed station and a plurality of mobile radio stations and the mobile radio system of the period of communicating by letter between the mobile radio station according to the TDD system.Fixed station and mobile radio station comprise temporal information acquiring unit 12, and it is as the device that obtains split-second precision information by the gps satellite group.Send regularly generation unit 16 and generate the device that sends timing signal based on the TDD system as the temporal information of obtaining according to temporal information acquiring unit 12.Counter 17 sends timing signal according to each and counts, and is reset when temporal information acquiring unit 12 has obtained temporal information.Supplementary transmission/receiving element 13 is as the device that sends supplementary, and the transmission timing signal that will send regularly generation unit 16 generations in supplementary is defined as internal timing signal, and the count value of counter 17 is defined as internal count value.Supplementary transmission/receiving element 13 receives supplementarys, and the transmission timing signal with other stations in supplementary is defined as outside (another mobile radio station) timing signal, and the count value of the counter at other stations is defined as outside (another mobile radio station) count value.TDD transmission/reception control unit 14 is as the timing signal that utilizes the internal timing signal that undertaken by comparing unit 18 and the comparison between the external timing signal to select, realize the make comparisons device of value of internal count value and external counting value of the device of control, these comparing unit 18 usefulness according to the TDD system.
The mobile wireless electric control method of an embodiment is to be used for being controlled at radio communication time period between fixed station and a plurality of mobile radio station and the mobile wireless electric control method of the radio communication time period between the mobile radio station according to the TDD system.Obtain high precision time information by the gps satellite group, send timing signal thereby generate.Counter 17 sends timing signal according to each and counts, and is reset when having obtained temporal information.The count value of counter 17 is defined as internal count value, and will be defined as internal timing signal according to the transmission timing signal that temporal information generates.Utilize supplementary to send internal count value and internal timing signal, utilize supplementary to receive external counting value and external timing signal, by comparing unit 18 internal count value and external counting value are compared, and select timing signal corresponding to less count value with control TDD transmission/reception control unit 14.In Fig. 1, label 1-1,1-2 represent mobile radio station, and 2-1,2-2 represent the gps satellite group, and not shown fixed station.And mobile radio station 1-1,1-2 have same structure and identical drawing reference numeral is represented components identical.In Fig. 1, the 11st, main information transmission/receiving element, the 12nd, temporal information acquiring unit, the 13rd, supplementary transmission/receiving element, the 14th, TDD transmission/reception control unit, the 15th, transmission/reception information process unit, the 16th, send regularly generation unit, the 17th, counter, the 18th, comparing unit, the 19th, Multiplexing Unit (MUX), the 20th, demultiplexing unit (DEMUX), and 21 are selectors.
The temporal information acquiring unit 12 of each mobile radio station has the arithmetic processing function, and as obtaining the device of split-second precision information by catching the gps satellite group.Mobile radio station 1-1 can catch four gps satellite group 2-1, and mobile radio station 1-2 for example only can catch three gps satellite group 2-2.Therefore, mobile radio station 1-1 can obtain split-second precision information, but mobile radio station 1-2 can not obtain split-second precision information.In mobile radio station 1-1, will be sent to by the temporal information that temporal information acquiring unit 12 obtains and send regularly generation unit 16.Send regularly generation unit 16 as generate the device that sends timing signal based on temporal information, should send timing signal and be sent to selector 21 and Multiplexing Unit 19, and add the reset signal of exporting along with the generation that sends timing signal to counter 17 as internal timing signal.
17 pairs of clock signals from the clock generator (not shown) of counter are counted, and according to reset signal count value are resetted.Can make the cycle of clock signal equal to send the timing signal cycle.When the temporal information of obtaining based on temporal information acquiring unit 12 sent timing signals from sending regularly generation unit 16 outputs, counter 17 resetted according to reset signal.In the time can't sending timing signal, continue the counting operation of counter 17 based on temporal information output.Send regularly generation unit 16 and can be constituted as can't be the time, under mode of operation, generating the periodic timing signal that sends from temporal information acquiring unit 12 acquisition time information.In this case, sending regularly generation unit 16 can be formed not to counter 17 output reset signals.Therefore, when by when gps satellite group of received radio wave has obtained temporal information, the count value vanishing (0) of counter 17, and when can't obtaining when sending timing signal, count value becomes and equals the value counted.The count value of counter 17 is sent to comparing unit 18 and Multiplexing Unit 19 as internal count value.The count value of counter 17 promptly represent the information of accuracy, and count value is more little as the likelihood score information (reliability information) that sends timing signal, and likelihood score is high more.
And, supplementary transmission/receiving element 13 as send as the mobile radio station supplementary, carry out the multiplexing internal timing signal and the device of internal count value by Multiplexing Unit 19.In addition, from other stations reception supplementarys and by demultiplexing unit 20 this supplementary is divided into external timing signal and external counting value.External timing signal is sent to selector 21, and the external counting value is sent to comparing unit 18.Comparing unit 18 is exported the selection signal that is used to control selector 21 by as the device that internal count value and external counting value are compared.That is,, select the timing signal of likelihood score higher (reliability height) by comparing the likelihood score of internal timing signal and external timing signal.
In addition, TDD transmission/reception control unit 14 is as being controlled at the device that the information between transmission/reception information process unit 15 and the main information transmission/receiving element 11 sends and receives according to TDD system, the selected transmission timing signal of use.That is, this control unit 14 sends information and receives information from other stations to other stations in the transmission of distributing to this mobile radio station with in the reception period, but also sends information and receive information from fixed station to fixed station in other periods.The transmission timing signal of importing this TDD transmission/reception control unit 14 is internal timing signal or the external timing signal that will optionally be exported by selector 21.As mentioned above, comparing unit 18 is internal count value and external counting value relatively, and because the likelihood score of the timing signal of less count value is higher, so control selector 21 is input to TDD transmission/reception control unit 14 with the timing signal with higher likelihood score of less count value.
In addition, main information transmission/receiving element 11 comprises frequency selector, this frequency selector is as for example selecting the device of channel by using above-mentioned CSMA system, make it possible to finish to the reception of the transmission information of fixed station and other mobile radio stations and based on be included in destination information in the transmission information etc. between a plurality of mobile radio stations or the radio communication of mobile radio station and fixed station.And supplementary transmission/receiving element 13 also comprises and the similar radio communication control structure of the radio communication control structure of main information transmission/receiving element 11.Unshowned fixed station is provided with the structure with the similar of mobile radio station 1-1,1-2, and comprise be similar to temporal information acquiring unit 12, be used for obtaining the structure of split-second precision information by catching the gps satellite group, and be similar to structure supplementary transmission/receiving element 13, that be used to send the supplementary that comprises internal timing signal and internal count value.The count value of fixed station is generally zero (0) in this case, and the expression timing signal has high likelihood score, i.e. high accuracy (reliability).
Fig. 2 (A), 2 (B) are to be used to summarize at temporal information transmit the figure that sends timing signal and switch the period of communicating by letter with 2 (C).In Fig. 2 (A), show fixed station 30 and a plurality of mobile radio station 31-1,31-2,31-3 ... between schematic relationships.In Fig. 2 (B), show the relation between the period T2 of communicating by letter according to the communication period T1 of the fixed station 30 of TDD system and mobile radio station.In Fig. 2 (C), show the communication period T of the mobile radio station of the service area that leaves fixed station 30.Communication period T2, T between mobile radio station promptly wherein use a plurality of channels and can select conflict free channel by using the CSMA system corresponding to following situation.Therefore, can realize between mobile radio station, carrying out radio communication according to channel number.And, in the period T1 that communicates by letter between fixed station 30 and mobile radio station, can use various multiplex communication systems.By shown in Fig. 2 (B), T1=T2 (T=T1+T2) being set for the TDD time slot, and the mobile radio station that utilizes the service area that has moved to fixed station 30 is realized the high accuracy switching controls to the TDD slot timing, can avoid the radio interference of communications between a plurality of mobile radio stations in the radio communication between fixed station 30 and mobile radio station 31-1,31-2.
In addition, mobile radio station 31-1,31-2 are just moving in the service area of fixed station 30, and other mobile radio stations 31-3,31-4,31-5 ... beyond this service area.Yet, if other mobile radio stations can carry out between these mobile radio stations in the distance of radio communication, even then mobile radio station 31-1,31-2 can not also can obtain the TDD slot timing synchronously by the system clock with fixed station 30 from gps satellite acquisition time information.That is,, fixed station 30 comprises the supplementary that sends timing signal and count value, so mobile radio station 31-1,31-2 receive supplementary from fixed station 30 as temporal information because sending.In this case, because count value equals minimum value 0, so selection is entered into TDD transmission/reception control unit 14 then from the transmission timing signal of fixed station 30.Therefore, can obtain the transmission timing synchronous with the system clock of fixed station 30.
And fixed station 30 is positioned at the position that can catch four or more a plurality of gps satellites, to carry out TDD control by obtaining split-second precision information.Under mobile radio station 31-1,31-2 shown in Fig. 2 (A) are just moving to situation in the service area of fixed station 30, mobile radio station 31-1,31-2 also can utilize temporal information acquiring unit 12 (with reference to Fig. 1) by catching four or more a plurality of gps satellite and with the fixed station 30 the same split-second precision information of obtaining.In the fixed station 30 and mobile radio station 31-1,31-2 under above-mentioned condition, the count value of counter 17 indication 0, this is because can generate the transmission timing signal by obtaining split-second precision information.
In addition, mobile radio station 31-3,31-4 ... beyond the service area of fixed station 30, and be in the situation of counter 17 forward countings of these mobile radio stations.And each mobile radio station (for example, mobile radio station 31-3) can be from transmission timing signal and the count value of mobile radio station 31-2 reception as supplementary under the state of the distance that can carry out radio communication mutually.In this case, because the external counting value that receives from mobile radio station 31-2 less than internal count value, so select external timing signal, is input to TDD transmission/reception control unit 14 with it as sending timing signal then.That is, mobile radio station 31-3 can be under the situation before being about to enter the service area of fixed station 30, will be input to TDD transmission/reception control unit 14 with the synchronous transmission timing signal of the transmission timing signal of fixed station 30.In addition, mobile radio station 31-4 receives transmission timing signal and count value as supplementary from mobile radio station 31-3, and by relatively internal count value and external counting value select to have the transmission timing signal of smaller value in the same manner.
When sending regularly generation unit 16 generation internal timing signals, will be reset to 0 as the count value of the precision information that sends timing signal, and when selecting external timing signal, the count value of counter 17 is counted.Yet, in the time can not passing through temporal information acquiring unit 12 acquisition time information, and when the external counting value that receives from the mobile radio station count value hour, thereby also can realize control selection external timing signal, the count value of counter 17 is updated to the external counting value, and will sending regularly, generation unit 16 forms with external timing signal synchronous.As a result, supplementary comprises through the count value of renewal and the inside transmission timing signal synchronous with external timing signal.By above-mentioned control, mobile radio station can receive the external timing signal with degree of precision when the service area of its more close fixed station 30.When mobile radio station had moved in the service area of fixed station 30, it can realize synchronously carrying out TDD control with the system clock of fixed station 30.
If mobile radio station can not obtain split-second precision information, then be difficult in the service area of fixed station, obtain the TDD slot timing.As a result, the radio communication between the mobile radio station will hinder radio communication between fixed station and the mobile radio station near the zone the service area of fixed station.Yet, mobile radio station near the service area of fixed station the zone can be based on the supplementary from the mobile radio station in the service area, receive timing signal and count value, determine the precision of timing signal by comparing count value, and select the timing signal of degree of precision based on less count value.Therefore, in the time of in mobile radio station moves to service area, can carry out TDD control because the precision of timing signal is higher, thereby avoid interference communication.
The application is involved in the Japanese publication No.2005-356274 that submitted in Japan Patent office on December 9th, 2005 and requires its priority, incorporates its content by reference at this.
Claims (5)
1. mobile radio system, this mobile radio system was used for according to radio communication period between tdd systems control fixed station and a plurality of mobile radio station and the radio communication period between the mobile radio station, and each in described fixed station and the described mobile radio station all comprises:
Temporal information deriving means, this temporal information deriving means are used to obtain outside high precision time information; And
Send regularly generating apparatus, this transmission regularly generating apparatus is used for according to described tdd systems, and the described temporal information of obtaining from described temporal information deriving means generates the transmission timing signal;
It is characterized in that comprising:
Counter, this counter carries out counting operation to the cycle of described at least transmission timing signal, and is reset when getting access to described temporal information by described temporal information deriving means;
Supplementary transmission/receiving system, this supplementary transmission/receiving system is used to send wherein and sends regularly the described transmission timing signal that generating apparatus generates and be defined as internal timing signal and the count value of described counter is defined as the supplementary of internal count value described, and is used to receive wherein the supplementary that transmission timing signal with other stations is defined as external timing signal and the count value of the counter at other stations is defined as the external counting value; And
Time division duplex transmission/receiving control device, this time division duplex transmission/receiving control device are used to use based on the comparison of described internal count value and described external counting value and one of timing signal of selecting is controlled described internal timing signal and described external timing signal.
2. mobile radio system according to claim 1, this mobile radio system also comprises:
Comparison means, this comparison means are used for described internal count value and described external counting value are compared;
Described time division duplex transmission/receiving control device is used to use described comparison means, select described internal timing signal during less than described external counting value in described internal count value, select described external timing signal during less than described internal count value in described external counting value; And
Main information transmission/receiving system is controlled this main information transmission/receiving system based on the timing signal that described time division duplex transmission/receiving control device is selected.
3. mobile wireless electric control method, this mobile wireless electric control method was used for according to radio communication period between tdd systems control fixed station and a plurality of mobile radio station and the radio communication period between the mobile radio station, and this mobile wireless electric control method may further comprise the steps:
Described fixed station and described mobile radio station all obtain same outside high precision time information and send timing signal to generate;
It is characterized in that,
When getting access to described temporal information, will be used for the cycle of described at least transmission timing signal is carried out the counter reset of counting operation;
The count value of described counter is defined as internal count value, and will be defined as internal timing signal from the described transmission timing signal that described temporal information generates;
Send described internal count value and described internal timing signal with supplementary;
Receive external counting value and external timing signal with supplementary;
Described internal count value and described external counting value are compared; And
Selection is corresponding to the timing signal of less count value.
4. mobile wireless electric control method according to claim 3, this mobile wireless electric control method also comprise the steps: based on the synchronous tdd systems of described transmission timing signal, between the handover of mobile stations according to communicating by letter the period between communication period of carrier sense multiple system and fixed station and mobile radio station.
5. mobile radio station, this mobile radio station can with fixed station and other mobile station communicates, described mobile radio station comprises:
Receiving element, this receiving element receives timing information;
Send timing generator, this sends timing generator and generates transmission regularly based on described timing information;
Counter, this counter carries out counting operation to generating the cycle that sends timing regularly at least, and is reset when getting access to described timing information by described receiving element; And
Transmitting element, this transmitting element sends regularly and is sent in described other mobile radio stations at least one about the described count value that sends described counter regularly described,
It is characterized in that further comprising:
Selector, this selector is based on sending regularly and each count value from the transmission regularly that described fixed station or described other mobile radio stations obtain about described, send timing and between the transmission regularly of described fixed station or described other mobile radio stations acquisitions, select one regularly described, and the count value of selected timing and correspondence is offered described transmitting element to send.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005356274A JP4519766B2 (en) | 2005-12-09 | 2005-12-09 | Mobile radio system and mobile radio control method |
| JP2005356274 | 2005-12-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1980478A CN1980478A (en) | 2007-06-13 |
| CN100566450C true CN100566450C (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101656282A Active CN100566450C (en) | 2005-12-09 | 2006-12-08 | Mobile radio system and mobile wireless electric control method |
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| US (1) | US7729320B2 (en) |
| EP (1) | EP1796294B1 (en) |
| JP (1) | JP4519766B2 (en) |
| CN (1) | CN100566450C (en) |
| DE (1) | DE602006019539D1 (en) |
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| JP5382576B2 (en) * | 2009-04-14 | 2014-01-08 | 国立大学法人電気通信大学 | Communication apparatus and communication timing synchronization method |
| JP6175775B2 (en) * | 2013-01-18 | 2017-08-09 | セイコーエプソン株式会社 | Timing signal generating device, electronic device and moving body |
| US9603113B2 (en) * | 2013-10-29 | 2017-03-21 | Qualcomm Incorporated | Distributed algorithm for constructing and maintaining a hierarchical structure for device-to-device synchronization |
| EP2819467A1 (en) * | 2014-06-19 | 2014-12-31 | Kenneth Hann | A method and a device for generating a timing signal |
| JP6577511B2 (en) * | 2017-04-24 | 2019-09-18 | 株式会社東芝 | Communication relay system and method |
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| WO1999065163A1 (en) | 1998-06-08 | 1999-12-16 | Nokia Networks Oy | A method for synchronization of a cellular radio network |
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2005
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|---|---|
| EP1796294B1 (en) | 2011-01-12 |
| JP4519766B2 (en) | 2010-08-04 |
| JP2007165998A (en) | 2007-06-28 |
| EP1796294A1 (en) | 2007-06-13 |
| CN1980478A (en) | 2007-06-13 |
| US7729320B2 (en) | 2010-06-01 |
| DE602006019539D1 (en) | 2011-02-24 |
| US20070135115A1 (en) | 2007-06-14 |
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